from django.contrib.auth.backends import ModelBackend
import re
from users.models import User

class MyAuthenticateBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        try:
            #1,判断username,是否是手机号
            if re.match(r'^1[3-9]\d{9}$',username):
                user = User.objects.get(mobile=username)
            else:
                #2,否则使用用户名查询
                user = User.objects.get(username=username)
        except User.DoesNotExist:
            return None
        if user.check_password(password) and self.user_can_authenticate(user):
            return user